Pathogenicity and antigenicity of a new variant of Korean nephropathogenic infectious bronchitis virus
Journal of Veterinary Science
;
: 357-359, 2009.
Artigo
em Inglês
| WPRIM
| ID: wpr-67596
ABSTRACT
Despite the existence of an active vaccination program, recently emerged strains of nephropathogenic infectious bronchitis virus (IBV) in Korea have caused significant economic losses in the poultry industry. In this study, we assessed the pathogenic and antigenic characteristics of a K-IIb type field strain of IBV that emerged in Korea since 2003, such as Kr/Q43/06. Specific pathogen free 1-week-old chickens exhibited severe respiratory symptoms (dyspnea) and nephropathogenic lesions (swollen kidneys with nephritis and urate deposits) following challenge with the recent IBV field strain. The antigenic relatedness (R value), based on a calculated virus neutralization index, of the K-IIb type field strain and K-IIa type strain KM91 (isolated in 1991) was 30%, which indicated that the recent strain, Kr/Q43/06, is a new variant that is antigenically distinct from strain KM91. This report is the first to document the emergence of a new antigenic variant of nephropathogenic IBV in chicken from Korea.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Doenças das Aves Domésticas
/
Virulência
/
Galinhas
/
Organismos Livres de Patógenos Específicos
/
Infecções por Coronavirus
/
Vírus da Bronquite Infecciosa
/
Coreia (Geográfico)
/
Nefrite
/
Antígenos Virais
Limite:
Animais
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Journal of Veterinary Science
Ano de publicação:
2009
Tipo de documento:
Artigo
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